近日，南开大学胡同亮团队报道了在高度坚固的金属有机框架中，通过完整的分子筛选机制从八氟丙烷中捕获痕量六氟丙烯。相关论文于2026年3月16日发表在《德国应用化学》杂志上。

利用多孔吸附剂深度脱除八氟丙烷中微量六氟丙烯杂质极具应用前景，但该领域仍缺乏能够突破吸附容量与吸附选择性之间固有权衡关系的基准吸附剂。

研究组报道了一种结构高度稳定的金属有机框架材料镍-吡嗪-吡唑，该材料具有为六氟丙烯量身定制的静电势互补表面与分子筛通道，实现了对六氟丙烯的最优吸附容纳和对八氟丙烷的完全排阻。在298开尔文、1.0巴条件下，镍-吡嗪-吡唑展现出创纪录的六氟丙烯/八氟丙烷吸附选择性（137.6）和优异的六氟丙烯吸附容量（55.02立方厘米每克）。动力学分析进一步证实，镍-吡嗪-吡唑对八氟丙烷的吸附可忽略不计（0.36立方厘米每克），且在298开尔文下六氟丙烯的有效扩散系数为9.29 × 10^-5每秒。

分子模拟与原位傅里叶变换红外光谱揭示了孔道限域效应的协同作用，表面静电互补性通过多重氢键相互作用赋予了对六氟丙烯的高识别能力。固定床穿透实验验证了该材料能从八氟丙烷中高效脱除微量六氟丙烯杂质，实现八氟丙烷的优质产率（2.06 × 10³升每千克，纯度超过99.999%）。凭借其优异的稳定性、可回收性和低成本前驱体，镍-吡嗪-吡唑为工业级全氟电子特种气体纯化提供了理想平台。

附：英文原文

Title: Trace Capture Hexafluoropropylene From Octafluoropropane via Complete Molecular Sieving Mechanism in a Highly Robust Metal−Organic Framework

Author: Lan Lan, Si-Jia Wei, Wei Xia, Qiang Zhang, Yanghe Liu, Chaosheng Bao, Mingren Cheng, Ze-Ying Qian, Lu-Lu Wang, Yi-Long Li, Min Feng, Zongbi Bao, Tong-Liang Hu

Issue&Volume: 2026-03-16

Abstract: Deep removal of trace hexafluoropropylene (C3F6) impurity from octafluoropropane (C3F8) using porous adsorbents is highly promising, but the field still suffers from the lack of benchmark adsorbents capable of overcoming the inherent trade-off between adsorption capacity and uptake ratio. Herein, we report a highly robust metalorganic framework, Ni-pca-pyz, which features an electrostatic-potential complementary surface and molecular-sieving channel tailored for C3F6, realizes the optimal accommodation of C3F6 and complete exclusion of C3F8. Ni-pca-pyz exhibits a record-high C3F6/C3F8 uptake ratio (137.6), coupled with exceptional C3F6 adsorption capacity (55.02 cm3 g1) at 298 K and 1.0 bar. Kinetic analysis further confirms negligible adsorption of C3F8 (0.36 cm3 g1) in Ni-pca-pyz, and effective diffusion coefficient for C3F6 is 9.29 × 105 s1 at 298 K. Molecular simulations and in situ Fourier transform infrared spectroscopy (FTIR) elucidate the synergetic effect of pore confinement, and surface electrostatic complementarity confers high recognition of C3F6 through multiple hydrogen bonding interactions. The column breakthrough experiments validate the efficient removal of trace C3F6 from C3F8, affording an excellent C3F8 productivity of 2.06 × 103 L kg1 (purity exceeding 99.999%). With its outstanding stability, recyclability, and low-cost precursors, Ni-pca-pyz provides an ideal platform for industrial perfluorinated electronic specialty gases (ESGs) purification.

DOI: 10.1002/anie.6037453

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.6037453